US6310560B2 - Communication device and process - Google Patents
Communication device and process Download PDFInfo
- Publication number
- US6310560B2 US6310560B2 US09/121,687 US12168798A US6310560B2 US 6310560 B2 US6310560 B2 US 6310560B2 US 12168798 A US12168798 A US 12168798A US 6310560 B2 US6310560 B2 US 6310560B2
- Authority
- US
- United States
- Prior art keywords
- information
- representative
- central unit
- station
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/002—Telephonic communication systems specially adapted for combination with other electrical systems with telemetering systems
Definitions
- the invention relates to a communication device comprising a central unit and at least one station, and also to a communication process between said central unit and said station.
- Known communication devices comprise a central unit and stations connected via a communication network. Information exchanges between the stations and the central unit generally take place according to a master-slave communication mode or continuously on events.
- the central unit In the master-slave exchange mode, the central unit requests information from a station which replies to it by transmitting the requested information back to it.
- This exchange mode has the advantage of being simple. However, the information flow across the network becomes high and there is a risk of saturation due to the double information flow. Indeed, before each item of information which a station has to transmit to the central unit, there is a request from the central unit to said station.
- the exchange on event mode is well suited to communication devices in which the stations have a small quantity of information to transmit. But when the stations are associated in particular to complex apparatuses such as circuit breakers comprising electronic trip devices or measuring devices or devices for computing several electrical quantities, the master-slave or on-event exchange modes do not allow optimum use of the communication network.
- the object of the invention is to achieve a communication device and process enabling optimum use of a communication network connecting a central unit to stations.
- At least one station comprises means for storing data representative of type of information to be transmitted and means for storing parameters representative of conditions for transmission of information from the station to the central unit, associated to the data representative of type of information to be transmitted.
- Said at least one station comprises, in particular, checking means to transmit information defined by type of information to be transmitted data according to the parameters representative of transmission conditions.
- At least one of the parameters representative of transmission conditions is representative of transmission of information on a request from the central unit.
- At least one of the parameters representative of transmission conditions is representative of transmission of information according to a preset variation of an item of information.
- At least one of the parameters representative of transmission conditions is representative of transmission of information at preset time intervals.
- At least one of the parameters representative of transmission conditions is representative of transmission of information on an event.
- the checking means are connected to a device for measuring electrical quantities.
- the checking means are connected to an electronic trip device supplying information representative of electrical quantities and status information.
- At least one station comprises storage means for storing information temporarily.
- a communication process between a central unit and at least one station comprises an operating phase comprising:
- At least one transmission condition parameter is representative of transmission of information on a request from the central unit.
- At least one transmission condition parameter is representative of transmission of information according to a variation of the value of an item of information.
- At least one transmission condition parameter is representative of transmission of information at preset time intervals.
- the communication process comprises a parameter setting phase comprising:
- a storage stage in at least one station of data representative of type of information to be transmitted.
- the communication process comprises a parameter setting phase comprising:
- a storage stage in at least one station of the parameters representative of transmission conditions in at least one station of the parameters representative of transmission conditions.
- FIG. 1 represents a known communication device
- FIG. 2 represents a communication device according to an embodiment of the invention
- FIG. 3 represents a communication device according to an embodiment of the invention comprising a station connected to an electronic trip device,
- FIG. 4 represents a parameter setting phase of a communication process according to an embodiment of the invention
- FIGS. 5 and 6 represent a first and second operating phase of communication processes according to embodiments of the invention.
- the communication device of FIG. 1 comprises in known manner a central unit 1 connected to a communication network 2 and stations 3 and 4 also connected to the communication network.
- the station 3 is connected to an events detector 5 and the station 4 is connected to events detectors 6 and 7 .
- the central unit 1 requests information from the stations 3 or 4 which reply to it.
- This exchange mode occupies the network twice at each information request. Thus, when the data have to be frequently refreshed in the central unit, the network occupation rate becomes very high.
- the communication device can operate in exchange on event mode.
- a large quantity of information can be received by the central unit.
- this information a large part is liable not to be systematically used. This flow of useless information increases the network occupation rate.
- the stations comprise means for checking transmission of in formation to the central unit so as to optimize the information flow in the communication network.
- the stations transmit information to the central unit according to predetermined transmission criteria. These criteria are associated to items of information or to types of information. For example, a station can transmit certain information on a request from the central unit and other information on occurrence of an event.
- FIG. 2 represents a block diagram of a communication device according to an embodiment of the invention.
- a station 8 connected to the communication network 2 comprises an information transmission checking circuit 9 connected to the network and a storage circuit or memory 10 connected to the checking circuit 9 .
- Events detectors 11 and 12 connected to the checking circuit 9 supply information to the station.
- the storage circuit 10 stores transmission condition parameters associated to information or to types of information.
- the transmission condition parameters correspond for example to information transmissions on a request from the central unit, on a variation of a value of certain variables, at preset time intervals, or when an event is detected.
- the circuit 9 checks information transmission according to the parameters stored in the storage circuit.
- the storage circuit parameters can be set either in fixed manner or in dynamic manner in a parameter setting phase.
- the central unit indicates to the station concerned the information it has to receive and the transmission condition parameters associated to each item of information.
- the information flow in the network is optimized as the station only transmits to the central unit the necessary information for the application for which it is intended.
- the information and the parameters for information transmission from the station to the central unit can be changed in another parameter setting phase.
- FIG. 3 represents an embodiment of a device according to the invention comprising a station 13 connected to an electronic trip device 14 of a circuit breaker 15 .
- the electronic trip device comprises a processing unit 16 connected to the station 13 .
- This processing unit receives signals representative of currents, signals representative of voltages, and for example signals representative of the status of the electrical contacts.
- the processing unit supplies an opening order of the circuit breaker main contacts according to the signals it receives.
- the processing unit computes a large number of electrical or physical quantities according to the signals 17 , 18 , 19 representative of currents or voltages. These quantities are in particular rms, peak or mean values, and also harmonics, currents or voltages; power values, phase difference values or values of the electrical energy supplied via the circuit breaker; values representative of tripping functions on fault currents or temperature rises. All of these quantities and others, in particular representative of settings of the processing unit such as thresholds or time delays, can be transmitted to the central unit 1 via the station 13 .
- the central unit transmits to the station data representative of the information it has to receive and transmission condition parameters associated to the information.
- the data and parameters are stored in the circuit 10 to be used by the checking circuit 9 .
- the processing unit transmits to the station the quantities it disposes of in the form of information.
- the checking circuit transmits information to the central unit according to the parameters stored in the storage circuit 10 .
- the station can advantageously comprise a buffer circuit 20 for temporary storage of the information supplied by the processing unit.
- the central unit in the parameter setting phase, can for example request to receive contact opening or closing information as soon as these events occur, voltage or current variation information when these are detected by the checking circuit, electrical power information at preset time intervals or phase difference values when the central unit requests them.
- the information which the central unit requires frequently or rapidly is transmitted automatically by the station on an event or at a preset time interval, and the information which concerns the central unit randomly or which does not have to be frequently refreshed is preferably transmitted on a request from the central unit.
- FIG. 4 represents a flowchart of a parameter setting phase of a communication process according to the invention.
- the central unit transmits to the station data representative of the information or types of information it has to receive. Then, in a stage 22 , this data is stored in the station. Then, in a stage 23 , the central unit transmits transmission condition parameters to the station, and these parameters are stored in a stage 24 .
- Stages 21 and 23 can also be grouped in a single stage where the data representative of the information and the transmission condition parameters are transmitted in a single frame.
- the data and parameters are stored, for example, in the order of their receipt by the station.
- the flowchart of FIG. 5 represents an operating phase in an embodiment of a process according to the invention.
- information is supplied to the station.
- This information represents for example electrical quantities or events such as opening of contacts or tripping of a circuit breaker.
- the checking circuit determines according to the stored data and parameters whether information has to be transmitted and under what conditions. Thus, if transmission conditions are complied with, the station transmits the information in a stage 27 .
- FIG. 6 represents a detailed flowchart of an operating phase of a station.
- the checking circuit checks whether an information item has to be transmitted on a request from the central unit, then transmits said information if the condition is complied with at stage 29 .
- the checking circuit checks whether the value of an information item has varied from a preset value, then it transmits said information to the central unit (stage 31 ) if this variation is effective. Then, in a stage 32 , the checking circuit waits for preset time intervals before transmitting information concerned by said intervals to the central unit in a stage 33 .
- transmission conditions described above are not restrictive. Other transmission conditions can be used in other embodiments. These conditions may be complex. For example, a transmission condition may be a combination of several conditions. Likewise, an information item may be transmitted according to several distinct criteria for example, on a request from the central unit and according to a preset time interval.
- the events detectors 6 , 7 , 11 and 12 represent all the applications associated to the stations and able to generate information to be transmitted to the central unit. These detectors may be electronic trip devices as in FIG. 3, relays, measuring devices, or other monitoring devices.
Abstract
Description
Claims (13)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9710631 | 1997-08-20 | ||
FR9710631A FR2767619B1 (en) | 1997-08-20 | 1997-08-20 | COMMUNICATION DEVICE AND METHOD |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010011956A1 US20010011956A1 (en) | 2001-08-09 |
US6310560B2 true US6310560B2 (en) | 2001-10-30 |
Family
ID=9510483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/121,687 Expired - Lifetime US6310560B2 (en) | 1997-08-20 | 1998-07-24 | Communication device and process |
Country Status (4)
Country | Link |
---|---|
US (1) | US6310560B2 (en) |
EP (1) | EP0898408A1 (en) |
JP (1) | JPH11150548A (en) |
FR (1) | FR2767619B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030015353A1 (en) * | 2001-06-18 | 2003-01-23 | Kroll William P. | Telemetry technology for measurement devices |
US6671148B2 (en) | 2001-06-29 | 2003-12-30 | General Electric Company | Electronic communicating residential circuit breaker |
US11004638B2 (en) * | 2019-09-26 | 2021-05-11 | Alstom Transport Technologies | System for monitoring an electromechanical relay, assembly and method for monitoring relay operation conditions |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4972290A (en) * | 1989-09-29 | 1990-11-20 | Abb Power T & D Company Inc. | Electric power system with remote monitoring and control of protective relays |
US5025470A (en) | 1986-06-20 | 1991-06-18 | Badger Meter, Inc. | Automatic meter reading system with malfunction protection |
US5031209A (en) | 1990-01-29 | 1991-07-09 | Badger Meter, Inc. | Automatic meter reader with microcomputer control system |
US5426421A (en) * | 1986-04-21 | 1995-06-20 | Gray; William F. | Method of automatically managing a network or remote function-excecuting apparatus from a programable network control center |
US5553094A (en) * | 1990-02-15 | 1996-09-03 | Iris Systems, Inc. | Radio communication network for remote data generating stations |
US5617286A (en) * | 1994-09-30 | 1997-04-01 | Siemens Energy & Automation, Inc. | Circuit breaker having data recording |
US5739760A (en) * | 1995-02-08 | 1998-04-14 | Fujitu Limited | Method and system for remote supervisory control |
US5748104A (en) * | 1996-07-11 | 1998-05-05 | Qualcomm Incorporated | Wireless remote telemetry system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2071804A1 (en) * | 1991-06-24 | 1992-12-25 | Ronald G. Ward | Computer system manager |
-
1997
- 1997-08-20 FR FR9710631A patent/FR2767619B1/en not_active Expired - Fee Related
-
1998
- 1998-07-24 US US09/121,687 patent/US6310560B2/en not_active Expired - Lifetime
- 1998-08-19 EP EP98410094A patent/EP0898408A1/en not_active Withdrawn
- 1998-08-20 JP JP10234499A patent/JPH11150548A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5426421A (en) * | 1986-04-21 | 1995-06-20 | Gray; William F. | Method of automatically managing a network or remote function-excecuting apparatus from a programable network control center |
US5025470A (en) | 1986-06-20 | 1991-06-18 | Badger Meter, Inc. | Automatic meter reading system with malfunction protection |
US4972290A (en) * | 1989-09-29 | 1990-11-20 | Abb Power T & D Company Inc. | Electric power system with remote monitoring and control of protective relays |
US5031209A (en) | 1990-01-29 | 1991-07-09 | Badger Meter, Inc. | Automatic meter reader with microcomputer control system |
US5553094A (en) * | 1990-02-15 | 1996-09-03 | Iris Systems, Inc. | Radio communication network for remote data generating stations |
US5617286A (en) * | 1994-09-30 | 1997-04-01 | Siemens Energy & Automation, Inc. | Circuit breaker having data recording |
US5739760A (en) * | 1995-02-08 | 1998-04-14 | Fujitu Limited | Method and system for remote supervisory control |
US5748104A (en) * | 1996-07-11 | 1998-05-05 | Qualcomm Incorporated | Wireless remote telemetry system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030015353A1 (en) * | 2001-06-18 | 2003-01-23 | Kroll William P. | Telemetry technology for measurement devices |
US6671148B2 (en) | 2001-06-29 | 2003-12-30 | General Electric Company | Electronic communicating residential circuit breaker |
US11004638B2 (en) * | 2019-09-26 | 2021-05-11 | Alstom Transport Technologies | System for monitoring an electromechanical relay, assembly and method for monitoring relay operation conditions |
Also Published As
Publication number | Publication date |
---|---|
EP0898408A1 (en) | 1999-02-24 |
FR2767619B1 (en) | 1999-10-22 |
JPH11150548A (en) | 1999-06-02 |
FR2767619A1 (en) | 1999-02-26 |
US20010011956A1 (en) | 2001-08-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5576700A (en) | Apparatus and method for controlling an electrical load and monitoring control operations and the electrical load | |
US4264960A (en) | System for controlling power distribution to customer loads | |
US4419667A (en) | System for controlling power distribution to customer loads | |
US4972290A (en) | Electric power system with remote monitoring and control of protective relays | |
US20100312414A1 (en) | System and method for power management and load shedding | |
US4419665A (en) | System for controlling power distribution to customer loads | |
US4370562A (en) | Electric power distribution system | |
US11616370B2 (en) | Recloser control with distributed energy resource synchronization | |
US6310560B2 (en) | Communication device and process | |
JPH0549169A (en) | Power controller | |
EP0597322A2 (en) | Consumption management and control device particularly for civil electric systems | |
JP2730493B2 (en) | Controlled station monitoring method | |
US10879700B2 (en) | Method and assembly for the load management of electrical devices | |
Carrión et al. | Alternative Under Frequency Load Disconnection Methodology Based on Semi-Adaptative Model | |
US20200259332A1 (en) | Load switch for fragile electric power networks | |
JP2000184600A (en) | Selected load cut-off apparatus | |
Sanders | Object modeling for pilot channel equipment in IEC61850 based devices | |
WO2023175733A1 (en) | Management device, management method, storage medium, and program | |
EP3944441A1 (en) | Single phase fault isolation and restoration with loop avoidance | |
US20230378745A1 (en) | Frequency-based distributed load disconnect | |
JP2003032914A (en) | Automation system of power distribution, and monitoring method thereof | |
JPH0787661A (en) | Protective relay, tester and testing system | |
KR102086149B1 (en) | Digital protection relay | |
CN117254445A (en) | Power distribution network response control method based on mayday algorithm | |
JPS6244038A (en) | Monitoring of overload |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SCHEIDER ELECTRIC SA, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WEYNACHTER, LUC;REEL/FRAME:009351/0741 Effective date: 19980629 |
|
AS | Assignment |
Owner name: SCHNEIDER ELECTRIC INDUSTRIES SA, FRANCE Free format text: CHANGE OF NAME;ASSIGNOR:SCHNEIDER ELECTRIC SA;REEL/FRAME:010776/0052 Effective date: 19990507 |
|
AS | Assignment |
Owner name: SQUARE D. COMPANY, ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHNEIDER ELECTRIC INDUSTRIES SA;REEL/FRAME:011122/0159 Effective date: 20000627 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |